Study On Reservoir Characteristics Of Huanglong Formation In Carboniferous Of Huaying

This paper is mainly based on these theories,such as carbonate sedimentology,reservior geology, petrology, tectonic geology, logging geology, and exploration geology,and so forth, combined with geology, logging, core and analysis data. reference predecessors research results, carried out The west of Huaying Mountain Carboniferous formation exhibition cloth, and advantage deposition micro phase, and storage layer features, and diagenesis role on storage layer development of control.Study on Carboniferous stratigraphic-lithologic stability, interface, comparability is good. Carboniferous total thickness is from North to South and from East to West is thinning as well as characteristics of pinch. The West of Huaying Mountain Carboniferous sedimentary environment of the mainly as follows:granular micro-facies, sand beach, beach, algae, dolomitic flat floor, NI Yun Ping. Clouds of particles in the intertidal Beach facies and microfacies of reservoir development in the cloud is best, algae-supratidal, dolomitic flat and subtidal ash cloud ping the reservoir is relatively poor. Rock types in the study area the main mineral composition of dolomite, limestone, contain small amounts of organic matter, asphalt, gypsum, pyrite, quartz, fluorite, and so on.Reservoir rock types in the study area, mainly in dolomite, grain particles mainly dolomite, limestone reservoir basic rudimentary. Core and slice observation revealed pore as the main reservoir. Pores to intergranular and intragranular pores and intergranular pores, cracks in the study area is underdeveloped Carboniferous reservoir (Karst) pore type reservoir. Hua ying West Carboniferous reservoir developed well, but strong lateral heterogeneity, dominated by Ⅲ reservoir. Huanglong is the main reservoir of the second layer. Porosity arithmetic mean of2.07%, average penetration rate was0.67mD, reservoir for low porosity and low permeability reservoir in General.Since the Carboniferous was deposited, due to repeated movements of the crust, whose deposits are subject to different degrees of modification, destruction, diagenesis is complicated, and directly affect the rock fabric and reservoir pore structure changes. Influence and control of the main Diagenesis of reservoir compaction, cementation, dissolution and effects of clouds, and so on. Compaction and cementation for reservoir development have played a destructive role, they can reduce the reservoir porosity. Dolomitization and dissolution effects on reservoir development plays a constructive role, they can improve the reservoir.